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Offline aminemed

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broke my carb when tightening emulsion tube
« on: April 25, 2018, 12:44:33 PM »
changed my main jet today and when i was tightening my emulsion tube in the carb it broke, see picture please. Can i weld this ? bike is cb 750 and carbs are 657b
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Offline DaveBarbier

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Re: broke my carb when tightening emulsion tube
« Reply #1 on: April 25, 2018, 01:21:55 PM »
It potentially could be micro welded. Jim French is the guy you want to talk to for that.

Read through this thread for ideas.

http://forums.sohc4.net/index.php?topic=158130.0
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Offline ekpent

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Re: broke my carb when tightening emulsion tube
« Reply #2 on: April 26, 2018, 05:02:28 AM »
  As you found out those emulsion tubes just get snugged up gently and when your done there is still a lot of thread showing  ;)  You may be able to shade tree fix it with the ole' 45 acp caliber pistol cartridge fix. I did it on one that was cracked but not completely broken. Here is a link to this fix.  http://forums.sohc4.net/index.php?topic=126236.0
  Here is another thread with pics showing how I fixed mine way back when  http://forums.sohc4.net/index.php?topic=100144.0
« Last Edit: April 26, 2018, 05:10:25 AM by ekpent »
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Offline PeWe

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Re: broke my carb when tightening emulsion tube
« Reply #3 on: April 26, 2018, 05:35:25 AM »
Cheaper to find another old carb?
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline ekpent

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Re: broke my carb when tightening emulsion tube
« Reply #4 on: April 26, 2018, 05:37:32 AM »
Quote from: PeWe on April 26, 2018, 05:35:25 AM
Cheaper to find another old carb?
Give you a pistol cartridge for free PeWE- Let me go pop a couple off out the back door   ;D ;D
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Offline aminemed

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Re: broke my carb when tightening emulsion tube
« Reply #5 on: April 26, 2018, 06:18:11 AM »
my carbs are 657b. Can i replace with a 657a or 086A carbs if i don't go with welding route ?
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Offline evanphi

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Re: broke my carb when tightening emulsion tube
« Reply #6 on: April 26, 2018, 08:51:01 AM »
Quote from: ekpent on April 26, 2018, 05:37:32 AM
Quote from: PeWe on April 26, 2018, 05:35:25 AM
Cheaper to find another old carb?
Give you a pistol cartridge for free PeWE- Let me go pop a couple off out the back door   ;D ;D

PEW PEW PEW
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--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline Yamahawk

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Re: broke my carb when tightening emulsion tube
« Reply #7 on: April 26, 2018, 09:11:38 AM »
Quote from: evanphi on April 26, 2018, 08:51:01 AM
Quote from: ekpent on April 26, 2018, 05:37:32 AM
Quote from: PeWe on April 26, 2018, 05:35:25 AM
Cheaper to find another old carb?
Give you a pistol cartridge for free PeWE- Let me go pop a couple off out the back door   ;D ;D

PEW PEW PEW
That's a pretty wimpy .45ACP Evan! Must be squib loads lol...
Charlie
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1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike.

The Only Thing Necessary for Evil to Triumph, is for Good Men to do Nothing.
Edmund Burke

All Things work together for good, for those who love God and are the Called according to His purpose.
Romans 8:28

Though He slay me, Yet will I trust Him...
Job 13:15
will you trust Him...?

Offline evanphi

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Re: broke my carb when tightening emulsion tube
« Reply #8 on: April 26, 2018, 09:25:34 AM »
Quote from: Yamahawk on April 26, 2018, 09:11:38 AM
Quote from: evanphi on April 26, 2018, 08:51:01 AM
Quote from: ekpent on April 26, 2018, 05:37:32 AM
Quote from: PeWe on April 26, 2018, 05:35:25 AM
Cheaper to find another old carb?
Give you a pistol cartridge for free PeWE- Let me go pop a couple off out the back door   ;D ;D

PEW PEW PEW
That's a pretty wimpy .45ACP Evan! Must be squib loads lol...
Charlie

Suppressed.
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--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline millla03

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Re: broke my carb when tightening emulsion tube
« Reply #9 on: April 26, 2018, 09:33:38 AM »
I think I have a full set of 657B carb bodies, and can hook you up with a replacement if you promise to be nice to it. Bought the whole rack for a lifter arm and the rest has been collecting dust for about 5 years. Think they're from a K2? PM if interested and I can look for them this weekend.
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Luke

72 Honda CB750 K2
78 BMW R100/7
83 Honda Nighthawk 650
07 Honda Rebel 250
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